24
2. Pipe “b” diameter (between manifold pipes)
Total indoor capacity after the manifold pipe (kW)
<16.8kW
15.88
19.05
22.22
28.58
28.58
31.8
38.1
9.52
9.52
9.52
12.7
15.88
19.05
19.05
Gas pipe (mm)
Liquid pipe (mm)
16.8KW≤X<22.4kW
22.4KW≤X<33.0kW
33.0KW≤X<47.0kW
47.0KW≤X<71.0kW
71.0KW≤X<101.0kW
≥101.0kW
Note: Adjust the diameter on job site (changing pipe is needed)
When the latter indoor total capacity is less than 14.0kw, pipe b will use the specification as the
pipe a.
3. Pipe “c” diameter (main pipe, between outdoor branch pipe and the first manifold pipe)
Note: When the distance from outdoor to the farthest indoor is over 80m, the enlarged diameter
should be chosen for the main pipe.
Installation procedure
Outdoor capacity
Main pipe
Enlarged main pipe
Gas pipe (mm)
Liquid pipe (mm)
Gas pipe (mm)
Liquid pipe (mm)
22.4kW
Ø19.05
Ø9.52
Ø22.2
Ø12.7
28.0kW
Ø22.2
Ø9.52
Ø25.4
Ø12.7
33.5kW
Ø25.4
Ø12.7
Ø28.58
Ø12.7
44.8kW
Ø28.58
Ø15.88
Ø31.8
Ø15.88
50.4kW
Ø28.58
Ø15.88
Ø31.8
Ø15.88
56.0kW
Ø28.58
Ø15.88
Ø31.8
Ø15.88
61.5kW
Ø28.58
Ø15.88
Ø31.8
Ø15.88
67.0kW
Ø31.8
Ø19.05
Ø38.1
Ø19.05
78.0kW
Ø31.8
Ø19.05
Ø38.1
Ø19.05
78.4kW
Ø31.8
Ø19.05
Ø38.1
Ø19.05
84.0kW
Ø31.8
Ø19.05
Ø38.1
Ø19.05
89.5kW
Ø31.8
Ø19.05
Ø38.1
Ø19.05
96.0kW
Ø31.8
Ø19.05
Ø38.1
Ø19.05
100.5kW
Ø38.1
Ø19.05
Ø38.1
Ø22.22
